Scrap-guiding attachment for amazeen skiving-machines.



J. H. LA BATE.

SCRAP GUIDING ATTACHMENT FOR AMAZEEN SKIVING MACHINES.

APPLICATION FILED AUG.23, I9I9.

Patented m. 30,1919.

"rrnn TATES PATEN onnicn.

JAMES H. LA BATE, 0F HA'VERHILL, IVIASSACHUSETTS, ASSIGNOB. 0F GIVE-HALF TO NELLIE M. JGHNSTON, 3F HAVERHILL, MASSACHUSETTS.

SCRAP-GUIDING ATTACHMENT FOR AMAZEEN SKIVING-IVEACHINES.

Application filed August 23, 1919.

To all whom it may concern:

Be it known that 1, JAMES H. Li BATE, a citizen of the United States, residing at H'averhill, in the county of Essex and State Massachusetts, have invented new and useful Improvements in Scrap-Guiding Attachments for Amazeen Skiving-Machines, of which the following is a specification.

The invention relates to the well-known Amazeen skiving machine which comprises the following elements, namely: a rotary feed roll, a presser foot adapted to hold a piece of stock to be skived against the feed roll, a rotary feed disk on an axis substantially perpendicular to the axis of the feed roll, and adapted to hold a portion of the stock against the feed roll, and a disk knife arranged in the path of stock advanced by the feed roll and feed disk, in such manner as to skive one edge of the stock and remove therefrom a scrap or skiving which is wedge-shape in cross section.

The scrap when it becomes considerably elongated, is moved by the disk knife on to the upper surface of the feed disk, and is liable to become engaged with the shaft of said disk and be wound upon said shaft in such manner as to interfere with the successful operation of the machine.

The object of the invention is to prevent the engagement of an elongated scrap with the shaft of the feed disk, and is embodied in the improved attachment which I will now proceed to describe and claim.

Of the accompanying drawings forming a part of this specification,--

Figure 1 is a top plan view of the presserfoot, feed roll, feed disk, and disk knife, of an Amazeen skiving machine, the shafts of the feed disk and disk knife being shown in section.

Fig. 2 is a front elevation of the parts shown by Fig. 1, showing also a portion of the bearing of the feed disk shaft.

Fig. 3 is a section on line 38 of Fig. 2, looking toward the right.

Fig. 4 is a fragmentary plan view showing portions of the presser foot, feed disk, feed roll and disk knife, the attachment shown by Figs. 1, 2, and 3 being omitted.

Fig. 5 is a perspective view of the attachment removed from the machine.

The same reference characters indicate the same parts in all of the figures.

The parts designated by reference letters Specification of Letters Patent.

Patented nee. so, 1919.

Serial No. 319,479.

are well known elements of an Amazeen skiving machine, and are arranged to cooperate in the usual manner. Said parts include a feed roll having a smooth portion a, and a knurled portion a, a feed disk Z fixed to a shaft 0 which is substantially perpendicular to the axis of the feed roll, although usually somewhat inclined relatively to the latter, as indicated by Fig. 2, the feed'disk shaft being journaled in the fixed bearing (Z, and pressed downwardly therein by a spring, not shown, so that a portion of the feed disk bears on the piece of stock 6 on the upper portion of the feed roll, a. presser-foot 7 arranged to hold down a portion of the stock advanced by the feed disk and feed roll, and a disk knife 9 arranged to skive one edge of the stock 6, and to cut a wedge-shaped scrap 6 therefrom, the knife rotating in the direction indicated by the arrow as (Figs. 1 and The shank f of the presser-foot is usually attached to a fixed arm or bracket on the frame of the machine, by a clamping nut, not shown, engaged with a fixed bolt pro jecting through a slot 7" in said shank. The presser-foot is usually provided with an adjustable extension f having a resilient shank 7, which is secured to the shank f by a screw i the extension f being adapted to be raised and lowered by a bearing screw 7, bearing on the shank and being adapted to raise and lower the extension i the shank 7 being provided with a pin i passing through a slot in the shank f.

I have thus particularly described the usual construction of, the presser-foot, because the screw f, nut f and pin f constitute elements of means for securing the ittachment of my invention to the presseroot.

The scrap or skiving 6, when it attains sufficient length, is deposited by the rotation of the disk knife upon the upper surface of the feed disk, the latter rotating in the direction of the arrow y (Fig. 1), and having atendency to move the scrap against the hub b of the feed disk, the scrap in many cases becoming wedged between the hub and the bearing d, and becoming tightly wound around the shaft, and thus seriously interfering with the operation of the machine. To prevent this difiiculty, I provide a scrap or guiding attachment, the preferred form of which is that shown in perspective by Fig. 5, said attachment being preferably madeof a single piece of sheet metal. The attachment as here shown, includes a base 12, adapted to be seated on the shank f and provided with orifices 13 and 1%, formed to receive the bearing screw 7' and the pin When the screw f and nut V f are removed, the base 12 is adapted to be deposited on the shank f and then secured by inserting the screw i in its place, and turning down the nut 7' upon the base l2. The attachment also includes an ear or wing 15, preferably integral with the base and standing at an angle thereto, as best shown by Fig. 3. The wing 15 is extended from the base sufficiently to project between the shaft of the feed disk and disk knife, and is preferably in close proximity to the feed disk hub b, as shown by Fig. 1. The outer end of the wing 15 is provided with a clownwardly offset portion 16, which is in close proximity to the outer surface of the feed disk Z) when the latter is in contact with the stock 6. 1

The arrangement of the wing 15 is such that a scrap or skiving c deposited on the upper surface of the feed disk is guided by said wing in a direction substantially tangential to the feed disk shaft, as indicated by dotted lines in Fig. 1, so that the scrap cannot contact with and be wound upon the hub or the shaft of the feed disk.

It will be seen that the described attach ment is adapted to be secured to the usual presser-foot without change or adaptation of the latter.

The wing 15 also prevents the scrap from being deposited upon the stock at or near the point where the skiving action takes place, and thus causing imperfect and dammerit.

rear edge of the presser-foot be as close as possible to the knife. As the diameter of the knife is reduced by Wear and 'rinding. Wear-compensating adjustment is effected by well known means provided for that purpose. The sight opening 18 prevents the attachment of my invention from interfering with the operators view of the relative positions of the presser-foot and knife.

When'my attachment is not employed the scrap e is sometimesdefiected upwardly by the hub of the knife g, as indicated by Fig. 3, until it falls forward upon the portion of the stock which is advancing .under the presser-foot and toward the knife, and is carried with the stock against the knife, the result being spoiled or imperfect work. This difficulty is prevented by the attach- Tn most cases the scrap is carried partly around the hub of the knife and upon the upper surface of the feed disk. When the attachment is employed the scrap passes tangentially from the feed disk, asindicated by dotted lines in Fig. 1.

I claim:

1. For use in a skiving machine having a feed roll, a presser-foot adapted to hold a piece of stock against the feed roll, a feed disk coiiperating with the feed roll, and a disk knife arranged to skive stock advanced under the resser-foot by the feed roll and feed disk, the above-described scrap-guiding attachment comprising a base, formed to bear on the upper side of the presser-foot and adapted to be secured to the latter, said base having a wing formed to project between the shafts of the feed disk and disk knife, and to guide a-scrap in a direction substantially tangential to the shaft of the feed disk.

2. An attachment substantially as specified by claim 1, the base being'provided with a sight opening.

In testimony whereof I have aflixed my signature.

JAMES H. LA BATE. 

